Applications called 'clients', requiring speech, communicate with SpeechHub to convert text into speech. At present SpeechHub supports the following applications:

NVDA screen readerSpeechHub connects to NVDA using a single add-on for all synthesizers but they appear separately in the Synthesizer NVDA dialog. Their use is exactly the same as any native synthesizer driver.

SpeakOn MediaSuiteSpeechHub support is available out-of-the-box in SpeakOn; if SpeechHub is installed, SpeakOn can use SpeechHub's synthesizers like other built-in synthesizer drivers.

Useful links

The NVDA support pages where you can find information about SpeechHub download, installation and use with NVDA arehere

The SpeakOn MediaSuite support pages where you can find information about SpeechHub download, installation and use with SpeakOn MediaSuite arehere

The SpeechHub full documentation where you can find an Introduction and development section ishere